Attwood 500 GPH 12V Shower Sump MK2 System

The Attwood 500 GPH 12V Shower Sump MK2 System collects shower or other compatible gray water and automatically pumps it overboard or into the boat's designated drainage system. The enclosed sump keeps drain water contained while the internal pump handles discharge, so it is useful where gravity drainage alone cannot reach the outlet.

Attwood's MK2 sump design promotes fast flow into and out of the box, and the snap-on lid can be removed for cleaning. A gasket helps control overflow at the cover, while an integrated air vent helps prevent airlock conditions that could interfere with pumping performance.

Confirm drain-hose sizes, discharge routing, electrical protection, mounting location, venting, and access to the lid before installation. Keep the sump and strainer area clean, secure all hose connections, and test automatic cycling with clean water. Install the box where routine inspection and debris removal remain practical. See what else we carry in bilge and water pumps.

• The enclosed pump system collects and discharges compatible shower water.
• A snap-on lid simplifies routine access.
• The integrated vent helps air escape from the sump system.
• A gasketed cover supports controlled sump operation.